The Conqueror's Ballad

Enchant creature
Enchanted creature gets +0/+4 and
double strike. It attacks every creature one by
one in an order of your choosing. This continues
until it dies or there are no creatures left on the battlefield. Destroy target creature. Creatures destroyed this way can't be regenerated.
"A death paved in slaughter, is an earned rest."
— Grimlore, Endless Death